| 摘要 |
<p>PURPOSE:To smoothly burn off the particles caught by a particle collecting filter and regenerate its filtering function by turning on electricity through electric heaters each for a certain time in such a way that adjacent two electric heaters are turned on in turn overlappingly. CONSTITUTION:A particle collecting filter is set in the casing 1, and a segregated electric heaters system 5 is set over the upstream side of the filter. This heaters system 5 has a star-shaped frame 6 to divide the filter end surface into several segments and electric heaters 81-86 made of elements 7 wired between the arms of the frame 6. Heaters 81-86 are connected to respective power terminals 91-96 which lead via respective power switches 111-116 to one power supply 16. On-off time of the respective electric switches 111-116 is controlled by a controller 13 in such a way that adjacent two heaters are turned on according to the on-off sequence overlappingly for a preset period.</p> |
